<template>
  <div
    class="list"
    ref="wrapper"
  >
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button">
            {{this.doubleCity}}
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button"
            v-for="item of hotCities"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            {{item.name}}
          </div>
        </div>
      </div>
      <div
        class="area"
        v-for="(item,key) of cities"
        :key="key"
        :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
          >{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapMutations, mapGetters } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  computed: {
    ...mapGetters(['doubleCity'])
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const ele = this.$refs[this.letter][0]
        this.scroll.scrollToElement(ele)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/variables.styl'

.border-topbottom
  &::before
    border-color #ccc

  &::after
    border-color #ccc

.border-bottom
  &::before
    border-color #ccc

.list
  position absolute
  overflow hidden
  left 0
  right 0
  top 1.78rem
  bottom 0

  .title
    line-height 0.54rem
    background-color #eee
    padding-left 0.2rem
    color #666
    font-size 0.26rem

  .button-list
    overflow hidden
    padding 0.1rem 0.6rem 0.1rem 0.1rem

    .button
      float left
      width 30%
      margin 0.1rem
      padding 0.1rem 0
      text-align center
      border 0.02rem solid #ccc
      box-sizing border-box

  .item-list
    .item
      line-height 0.76rem
      padding-left 0.2rem
</style>
